Promicon Systems

Fieldbuses and networks

Interface modules for various fieldbuses and networks are available to facilitate application of VariMotion in an array of system topologies.

All interface modules impress with a combination of high throughput and fast response times, factors of particular significance at high clock rates. To satisfy the demands associated with this criterion an ARM-based netX processor is used with Industrial Internet.

In addition, VariMotion can also be controlled in non-real-time networks by the TCP/IP protocol.

This is particularly interesting for connecting VariMotion directly to a PC or a computer, since they have an Ethernet Connection with TCP/IP is standard. Since VariMotion has an integrated control, time-critical tasks can be realized.

With Profinet it is also possible to transmit TCP/IP in addition to the process data. This means that the access to variables, the transfer of process data and the programming run via a single connection.


Network Input bytes Output bytes Variables
Profinet 512 512 at will via TCP/IP
Profibus 100 100 -
EtherCAT 512 512 -
CANopen 100 100 200 Integer (32 Bit)
200 Float (32 Bit)
TCP/IP - - at will

pNET protocol

The pNET protocol is a simple ASCII protocol that allows you to freely access variables of the multi‍-‍port memory and functional objects within VariMotion.

The pNET protocol is part of the operating system and does not require any program-related measures.

Access can be via TCP/IP or via serial interface. It is also possible to operate several connections at the same time.

This allows external devices and computers to read and write data without affecting the automation process.